diff options
6 files changed, 214 insertions, 201 deletions
diff --git a/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java b/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java index 766dc925..7c17bed9 100644 --- a/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java +++ b/app/src/main/java/de/blinkt/openvpn/core/OpenVPNService.java @@ -47,7 +47,7 @@ import de.blinkt.openvpn.core.connection.Obfs4Connection; import se.leap.bitmaskclient.R; import se.leap.bitmaskclient.VpnNotificationManager; import se.leap.bitmaskclient.pluggableTransports.Shapeshifter; -import se.leap.bitmaskclient.utils.FirewallHelper; +import se.leap.bitmaskclient.firewall.FirewallManager; import static de.blinkt.openvpn.core.ConnectionStatus.LEVEL_CONNECTED; import static de.blinkt.openvpn.core.ConnectionStatus.LEVEL_WAITING_FOR_USER_INPUT; @@ -90,7 +90,7 @@ public class OpenVPNService extends VpnService implements StateListener, Callbac private Runnable mOpenVPNThread; private VpnNotificationManager notificationManager; private Shapeshifter shapeshifter; - private FirewallHelper firewallHelper; + private FirewallManager firewallManager; private static final int PRIORITY_MIN = -2; private static final int PRIORITY_DEFAULT = 0; @@ -194,7 +194,7 @@ public class OpenVPNService extends VpnService implements StateListener, Callbac VpnStatus.removeStateListener(this); } } - firewallHelper.shutdownFirewall(); + firewallManager.shutdownFirewall(); } private boolean runningOnAndroidTV() { @@ -449,7 +449,7 @@ public class OpenVPNService extends VpnService implements StateListener, Callbac mProcessThread.start(); } - firewallHelper.startFirewall(); + firewallManager.startFirewall(); new Handler(getMainLooper()).post(() -> { if (mDeviceStateReceiver != null) { @@ -518,7 +518,7 @@ public class OpenVPNService extends VpnService implements StateListener, Callbac super.onCreate(); notificationManager = new VpnNotificationManager(this, this); notificationManager.createOpenVpnNotificationChannel(); - firewallHelper = new FirewallHelper(this); + firewallManager = new FirewallManager(this); } @Override diff --git a/app/src/main/java/se/leap/bitmaskclient/firewall/FirewallCallback.java b/app/src/main/java/se/leap/bitmaskclient/firewall/FirewallCallback.java new file mode 100644 index 00000000..f6ccd227 --- /dev/null +++ b/app/src/main/java/se/leap/bitmaskclient/firewall/FirewallCallback.java @@ -0,0 +1,7 @@ +package se.leap.bitmaskclient.firewall; + +interface FirewallCallback { + void onFirewallStarted(boolean success); + void onFirewallStopped(boolean success); + void onSuRequested(boolean success); +} diff --git a/app/src/main/java/se/leap/bitmaskclient/firewall/FirewallManager.java b/app/src/main/java/se/leap/bitmaskclient/firewall/FirewallManager.java new file mode 100644 index 00000000..a3be46e6 --- /dev/null +++ b/app/src/main/java/se/leap/bitmaskclient/firewall/FirewallManager.java @@ -0,0 +1,73 @@ +package se.leap.bitmaskclient.firewall; +/** + * Copyright (c) 2019 LEAP Encryption Access Project and contributers + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +import android.content.Context; + +import de.blinkt.openvpn.core.VpnStatus; +import se.leap.bitmaskclient.utils.PreferenceHelper; + + +public class FirewallManager implements FirewallCallback { + public static String BITMASK_CHAIN = "bitmask_fw"; + static final String TAG = FirewallManager.class.getSimpleName(); + + private Context context; + + public FirewallManager(Context context) { + this.context = context; + } + + + @Override + public void onFirewallStarted(boolean success) { + if (success) { + VpnStatus.logInfo("[FIREWALL] Custom rules established"); + } else { + VpnStatus.logError("[FIREWALL] Could not establish custom rules."); + } + } + + @Override + public void onFirewallStopped(boolean success) { + if (success) { + VpnStatus.logInfo("[FIREWALL] Custom rules deleted"); + } else { + VpnStatus.logError("[FIREWALL] Could not delete custom rules"); + } + } + + @Override + public void onSuRequested(boolean success) { + PreferenceHelper.setSuPermission(context, success); + if (!success) { + VpnStatus.logError("[FIREWALL] Root permission needed to execute custom firewall rules."); + } + } + + + public void startFirewall() { + StartFirewallTask task = new StartFirewallTask(this); + task.execute(); + } + + public void shutdownFirewall() { + ShutdownFirewallTask task = new ShutdownFirewallTask(this); + task.execute(); + } + +} diff --git a/app/src/main/java/se/leap/bitmaskclient/firewall/ShutdownFirewallTask.java b/app/src/main/java/se/leap/bitmaskclient/firewall/ShutdownFirewallTask.java new file mode 100644 index 00000000..50fa77cd --- /dev/null +++ b/app/src/main/java/se/leap/bitmaskclient/firewall/ShutdownFirewallTask.java @@ -0,0 +1,55 @@ +package se.leap.bitmaskclient.firewall; + +import android.os.AsyncTask; +import android.util.Log; + +import java.lang.ref.WeakReference; + +import static se.leap.bitmaskclient.firewall.FirewallManager.BITMASK_CHAIN; +import static se.leap.bitmaskclient.utils.Cmd.runBlockingCmd; + +class ShutdownFirewallTask extends AsyncTask<Void, Boolean, Boolean> { + + private WeakReference<FirewallCallback> callbackWeakReference; + + ShutdownFirewallTask(FirewallCallback callback) { + callbackWeakReference = new WeakReference<>(callback); + } + + @Override + protected Boolean doInBackground(Void... voids) { + boolean success; + StringBuilder log = new StringBuilder(); + String[] deleteChain = new String[]{ + "su", + "id", + "ip6tables --delete OUTPUT --jump " + BITMASK_CHAIN, + "ip6tables --flush " + BITMASK_CHAIN, + "ip6tables --delete-chain " + BITMASK_CHAIN + }; + try { + success = runBlockingCmd(deleteChain, log) == 0; + } catch (Exception e) { + e.printStackTrace(); + Log.e(FirewallManager.TAG, log.toString()); + return false; + } + + try { + boolean allowSu = log.toString().contains("uid=0"); + callbackWeakReference.get().onSuRequested(allowSu); + } catch (Exception e) { + //ignore + } + return success; + } + + @Override + protected void onPostExecute(Boolean result) { + super.onPostExecute(result); + FirewallCallback callback = callbackWeakReference.get(); + if (callback != null) { + callback.onFirewallStopped(result); + } + } +} diff --git a/app/src/main/java/se/leap/bitmaskclient/firewall/StartFirewallTask.java b/app/src/main/java/se/leap/bitmaskclient/firewall/StartFirewallTask.java new file mode 100644 index 00000000..9b3a125f --- /dev/null +++ b/app/src/main/java/se/leap/bitmaskclient/firewall/StartFirewallTask.java @@ -0,0 +1,74 @@ +package se.leap.bitmaskclient.firewall; + +import android.os.AsyncTask; +import android.util.Log; + +import java.lang.ref.WeakReference; + +import static se.leap.bitmaskclient.firewall.FirewallManager.BITMASK_CHAIN; +import static se.leap.bitmaskclient.utils.Cmd.runBlockingCmd; + +class StartFirewallTask extends AsyncTask<Void, Boolean, Boolean> { + + private WeakReference<FirewallCallback> callbackWeakReference; + + StartFirewallTask(FirewallCallback callback) { + callbackWeakReference = new WeakReference<>(callback); + } + + @Override + protected Boolean doInBackground(Void... voids) { + StringBuilder log = new StringBuilder(); + String[] bitmaskChain = new String[]{ + "su", + "id", + "ip6tables --list " + BITMASK_CHAIN }; + + + try { + boolean hasBitmaskChain = runBlockingCmd(bitmaskChain, log) == 0; + boolean allowSu = log.toString().contains("uid=0"); + try { + callbackWeakReference.get().onSuRequested(allowSu); + Thread.sleep(1000); + } catch (Exception e) { + //ignore + } + + boolean success; + log = new StringBuilder(); + if (!hasBitmaskChain) { + String[] createChainAndRules = new String[]{ + "su", + "ip6tables --new-chain " + BITMASK_CHAIN, + "ip6tables --insert OUTPUT --jump " + BITMASK_CHAIN, + "ip6tables --append " + BITMASK_CHAIN + " -p tcp --jump REJECT", + "ip6tables --append " + BITMASK_CHAIN + " -p udp --jump REJECT" + }; + success = runBlockingCmd(createChainAndRules, log) == 0; + Log.d(FirewallManager.TAG, "added " + BITMASK_CHAIN + " to ip6tables: " + success); + Log.d(FirewallManager.TAG, log.toString()); + return success; + } else { + String[] addRules = new String[] { + "su", + "ip6tables --append " + BITMASK_CHAIN + " -p tcp --jump REJECT", + "ip6tables --append " + BITMASK_CHAIN + " -p udp --jump REJECT" }; + return runBlockingCmd(addRules, log) == 0; + } + } catch (Exception e) { + e.printStackTrace(); + Log.e(FirewallManager.TAG, log.toString()); + } + return false; + } + + @Override + protected void onPostExecute(Boolean result) { + super.onPostExecute(result); + FirewallCallback callback = callbackWeakReference.get(); + if (callback != null) { + callback.onFirewallStarted(result); + } + } +} diff --git a/app/src/main/java/se/leap/bitmaskclient/utils/FirewallHelper.java b/app/src/main/java/se/leap/bitmaskclient/utils/FirewallHelper.java deleted file mode 100644 index 26e6603a..00000000 --- a/app/src/main/java/se/leap/bitmaskclient/utils/FirewallHelper.java +++ /dev/null @@ -1,196 +0,0 @@ -package se.leap.bitmaskclient.utils; -/** - * Copyright (c) 2019 LEAP Encryption Access Project and contributers - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -import android.content.Context; -import android.os.AsyncTask; -import android.util.Log; - -import java.lang.ref.WeakReference; - -import de.blinkt.openvpn.core.VpnStatus; - -import static se.leap.bitmaskclient.utils.Cmd.runBlockingCmd; - -interface FirewallCallback { - void onFirewallStarted(boolean success); - void onFirewallStopped(boolean success); - void onSuRequested(boolean success); -} - - -public class FirewallHelper implements FirewallCallback { - private static String BITMASK_CHAIN = "bitmask_fw"; - private static final String TAG = FirewallHelper.class.getSimpleName(); - - private Context context; - - public FirewallHelper(Context context) { - this.context = context; - } - - - @Override - public void onFirewallStarted(boolean success) { - if (success) { - VpnStatus.logInfo("[FIREWALL] Custom rules established"); - } else { - VpnStatus.logError("[FIREWALL] Could not establish custom rules."); - } - } - - @Override - public void onFirewallStopped(boolean success) { - if (success) { - VpnStatus.logInfo("[FIREWALL] Custom rules deleted"); - } else { - VpnStatus.logError("[FIREWALL] Could not delete custom rules"); - } - } - - @Override - public void onSuRequested(boolean success) { - PreferenceHelper.setSuPermission(context, success); - if (!success) { - VpnStatus.logError("[FIREWALL] Root permission needed to execute custom firewall rules."); - } - } - - - private static class StartFirewallTask extends AsyncTask<Void, Boolean, Boolean> { - - WeakReference<FirewallCallback> callbackWeakReference; - - StartFirewallTask(FirewallCallback callback) { - callbackWeakReference = new WeakReference<>(callback); - } - - @Override - protected Boolean doInBackground(Void... voids) { - StringBuilder log = new StringBuilder(); - String[] bitmaskChain = new String[]{ - "su", - "id", - "ip6tables --list " + BITMASK_CHAIN }; - - - try { - boolean hasBitmaskChain = runBlockingCmd(bitmaskChain, log) == 0; - boolean allowSu = log.toString().contains("uid=0"); - try { - callbackWeakReference.get().onSuRequested(allowSu); - Thread.sleep(1000); - } catch (Exception e) { - //ignore - } - - boolean success; - log = new StringBuilder(); - if (!hasBitmaskChain) { - String[] createChainAndRules = new String[]{ - "su", - "ip6tables --new-chain " + BITMASK_CHAIN, - "ip6tables --insert OUTPUT --jump " + BITMASK_CHAIN, - "ip6tables --append " + BITMASK_CHAIN + " -p tcp --jump REJECT", - "ip6tables --append " + BITMASK_CHAIN + " -p udp --jump REJECT" - }; - success = runBlockingCmd(createChainAndRules, log) == 0; - Log.d(TAG, "added " + BITMASK_CHAIN + " to ip6tables: " + success); - Log.d(TAG, log.toString()); - return success; - } else { - String[] addRules = new String[] { - "su", - "ip6tables --append " + BITMASK_CHAIN + " -p tcp --jump REJECT", - "ip6tables --append " + BITMASK_CHAIN + " -p udp --jump REJECT" }; - return runBlockingCmd(addRules, log) == 0; - } - } catch (Exception e) { - e.printStackTrace(); - Log.e(TAG, log.toString()); - } - return false; - } - - @Override - protected void onPostExecute(Boolean result) { - super.onPostExecute(result); - FirewallCallback callback = callbackWeakReference.get(); - if (callback != null) { - callback.onFirewallStarted(result); - } - } - } - - private static class ShutdownFirewallTask extends AsyncTask<Void, Boolean, Boolean> { - - WeakReference<FirewallCallback> callbackWeakReference; - - ShutdownFirewallTask(FirewallCallback callback) { - callbackWeakReference = new WeakReference<>(callback); - } - - @Override - protected Boolean doInBackground(Void... voids) { - boolean success; - StringBuilder log = new StringBuilder(); - String[] deleteChain = new String[]{ - "su", - "id", - "ip6tables --delete OUTPUT --jump " + BITMASK_CHAIN, - "ip6tables --flush " + BITMASK_CHAIN, - "ip6tables --delete-chain " + BITMASK_CHAIN - }; - try { - success = runBlockingCmd(deleteChain, log) == 0; - } catch (Exception e) { - e.printStackTrace(); - Log.e(TAG, log.toString()); - return false; - } - - try { - boolean allowSu = log.toString().contains("uid=0"); - callbackWeakReference.get().onSuRequested(allowSu); - } catch (Exception e) { - //ignore - } - return success; - } - - @Override - protected void onPostExecute(Boolean result) { - super.onPostExecute(result); - FirewallCallback callback = callbackWeakReference.get(); - if (callback != null) { - callback.onFirewallStopped(result); - } - } - } - - - public void startFirewall() { - StartFirewallTask task = new StartFirewallTask(this); - task.execute(); - } - - public void shutdownFirewall() { - ShutdownFirewallTask task = new ShutdownFirewallTask(this); - task.execute(); - } - -} |